CN201383601Y

CN201383601Y - Electromagnetic radiation eliminator

Info

Publication number: CN201383601Y
Application number: CN200920115167U
Authority: CN
Inventors: 徐碧勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-12
Filing date: 2009-03-12
Publication date: 2010-01-13
Anticipated expiration: 2019-03-12

Abstract

The utility model provides an electromagnetic radiation eliminator with the function of checking a zero curve aiming at the problem that a zero curve checking circuit is unavailable in the prior art. The electromagnetic radiation eliminator has reliable work and excellent adaptability, and comprises a shell and a main circuit board, wherein the main circuit board is provided with an input end and an output end, the main circuit board comprises a radiation collecting circuit, a power supply detection circuit and an overvoltage protection circuit, the main circuit board is further provided with a zero curve detecting circuit, a resistance R5 and a capacitor C1 which are connected in parallel through a contact piece CP, a current-limiting resistance R3, an LED lamp NL1 and a current-limiting resistance R4 are connected with static contacts of a switch SW1 in turn, two dynamic contacts of a switch SW1 are respectively and electrically connected with two input ends through current-limiting resistances R1 and R2, the contact piece CP is touched with hands, and if LED lamp NL1 is enlightened, the switch SW1 is dialed to connect the contacts and the zero curve. The electromagnetic radiation eliminator has the beneficial effects that a zero curve detecting circuit is added for guaranteeing reliable work.

Description

Electromagnetic radiation eliminator

Technical field

The utility model relates to a kind of electromagnetic radiation eliminator that is used to eliminate the low frequency electromagnetic radiation that power consumption equipment such as computer produces.

Background technology

In the daily life, power consumption equipment such as household electrical appliance and computer can produce electromagnetic radiation, general mains supply does not have earth connection, the earth terminal of electrical appliance is unsettled, thereby can't connect the earth releases electromagnetic radiation and lets out, all can produce electromagnetic radiation far above safety standard as peripheral hardwares such as computer monitor, host computer, mouse and keyboards, the mutual interference effect of electromagnetic radiation meeting that electrical appliance produces is separately worked each other, and operating personnel's health of human body is had certain harm.Existing electromagnetic radiation eliminator comprises housing, is connected in the power input socket at housing two ends, power supply output plug and the main circuit board that is positioned at housing; main circuit board is provided with radiation Acquisition Circuit, power sense circuit and overvoltage crowbar; be coupled on the zero line of input power supply by the electromagnetic radiation that the radiation Acquisition Circuit will come from the earth connection originally unsettled in the electrical appliance, thereby eliminate electromagnetic radiation.The problem that this electromagnetic radiation eliminator exists is: 1) do not have the zero line testing circuit, and mains supply the situation of zero line and live wire reversal connection occurs through regular meeting, and when radiation elimination circuit is received on the live wire, do not have the effect of eliminating electromagnetic radiation at all; 2) owing to there is not overtemperature protection, electromagnetic radiation eliminator may cause burning when using in the place of poor heat radiation for a long time; What 3) input plug of housing two ends connection and accessory power outlet adopted all is the hard lead, is difficult to adjust angle, and use has inconvenience more; 4) do not have electromagnetic radiation detection device, the user can't learn whether electromagnetic radiation is eliminated.

Summary of the invention

The utility model provides a kind of electromagnetic radiation eliminator with zero line measuring ability at the problems referred to above that prior art exists, and its reliable operation, adaptability are good.

The technical scheme that the utility model adopted is:

Electromagnetic radiation eliminator, comprise housing and main circuit board, main circuit board is provided with input AC1, AC2 and output terminals A C1 ', AC2 ', and main circuit board comprises the radiation Acquisition Circuit that connected to form by resistance R 5 and capacitor C 1 back in parallel and earth terminal GND, by being connected in series with the power sense circuit that LED lamp NL2 between two inputs and current-limiting resistance R6 form; And the overvoltage crowbar that constitutes by the piezo-resistance S/G that is connected between two power inputs; also be provided with the zero line testing circuit on the main circuit board: connect successively with the fixed contact of switch SW 1 by resistance R 5 and capacitor C 1 after touch sheet CP, current-limiting resistance R3, LED lamp NL1, current-limiting resistance R4, the parallel connection; two moving contacts of switch SW 1 are electrically connected by current-limiting resistance R1, R2 with two inputs respectively; touch sheet CP with hand; if LED lamp NL1 is bright, then toggle switch SW1 makes moving contact be connected with zero line.

Be connected with thermistor PR1 between resistance R 5 after the parallel connection and capacitor C 1 and the earth terminal GND.

Its housing two ends are provided with power input socket and power supply output plug, and described housing is provided with universal wheel in output plug one side, and output plug is rotatably connected by universal wheel and housing.

Also comprise the electromagnetic radiation test pen that split is provided with, test pen comprises antenna ANT, field effect transistor T1 and triode T2, is used for the LED 1 of radiation demonstration, is used for LED 2, DC power supply BAT that power supply shows, antenna ANT is connected with field effect transistor T1 grid by current-limiting resistance R9, field effect transistor T1 source electrode is connected with DC power supply BAT is anodal by K switch 1, field effect transistor T1 drain electrode is connected with power supply BAT negative electricity, and field effect transistor T1 source electrode is connected by voltage stabilizing didoe D1 with triode T2 base stage; Triode T2 emitter is connected with power supply BAT negative pole, and triode T2 collector electrode is connected with LED 1 negative pole; The LED 1 anodal resistance R 7 of passing through links to each other with power supply BAT is anodal; The LED 2 anodal resistance R 8 of passing through link to each other with power supply BAT is anodal, and LED 2 negative poles link to each other with power supply BAT negative pole.

The beneficial effects of the utility model are: add the zero line testing circuit, guarantee reliable operation; Thermistor can guarantee that electromagnetic radiation eliminator can not break down because of overheated; The connection that is arranged so that electromagnetic radiation eliminator of universal wheel is more flexible, is not subjected to the relative power supply of electrical appliance to put the restriction of angle; Electromagnetic radiation eliminator also is furnished with the electromagnetic radiation test pen that split is provided with, testing environment electromagnetic radiation intensity quickly and easily.

Description of drawings

Fig. 1 is an explosive view of the present utility model;

Fig. 2 is a main circuit diagram of the present utility model;

Fig. 3 is the circuit diagram of electromagnetic radiation test pen.

Embodiment

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:

Referring to Fig. 1, electromagnetic radiation eliminator comprises housing 1, is connected in power input socket 2, the power supply output plug 3 at housing 1 two ends and the main circuit board 4 that is positioned at housing 1.

Referring to Fig. 2, main circuit board 4 is provided with and input socket 2 corresponding input end AC1, AC2 and output terminals A C1 ', the AC2 ' corresponding with output plug 3, main circuit board 4 comprises radiation Acquisition Circuit, power sense circuit and overvoltage crowbar, the radiation Acquisition Circuit: resistance R 5 is connected with earth terminal GND with capacitor C 1 back in parallel, earth terminal GND is connected with electrical appliance internal interface ground wire, is used for zero line is coupled in the electromagnetic radiation that electrical appliance produces; Power sense circuit: be connected in series with LED lamp NL2 and current-limiting resistance R6 between two power inputs, when mains supply was imported, NL2 lighted; Overvoltage crowbar: be connected in the piezo-resistance S/G between two power inputs, play dividing potential drop when voltage is excessive and do in order to the protection electrical appliance; Zero line testing circuit: touch sheet CP, current-limiting resistance R3, be used to show that the fixed contact of LED lamp NL1, current-limiting resistance R4, the R5 after the parallel connection and C1 and the switch SW 1 of connecting live wire connects successively, two moving contacts of switch SW 1 are connected by current-limiting resistance R1, R2 respectively with two inputs, the selection of 1 liang of moving contact of switch SW is selected by toggle switch on the housing 6, touch sheet CP and be electrically connected conducting with the touch button 7 of knob 8 that is positioned at enclosure interior and surface of shell, finger is touched zero line testing circuit conducting when touching button 7.The operation principle of zero line testing circuit is: hand contacts when touching button 7, and the SW1 moving contact is connected with live wire if the NL1 lamp is bright, and NL1 does not work then that the SW1 moving contact is connected with zero line.

Be serially connected with thermistor PR1 between resistance R 5 after the parallel connection and capacitor C 1 and the GND end, cause electromagnetic radiation eliminator to burn to prevent overheated.

Housing 1 is provided with universal wheel 5 in output plug 3 one sides, output plug 3 is rotatably connected by universal wheel 5 and housing 1, housing 1 is provided with rotating shaft 11, universal wheel 5 is provided with the swivel base that cooperates with rotating shaft 11, universal wheel 5 inboards are provided with fluting, and two leads of output plug 3 pass fluting and are electrically connected with main circuit board 4.

During use, extract the attaching plug on power consumption equipment such as the host computer in the power input socket that inserts electromagnetic radiation eliminator from main frame, in supply socket on the power supply output plug insertion host computer, again the computer power line is linked to each other with power supply, touch sheet with hand, illustrate that if the NL1 lamp is bright earth terminal GND signal end received on the live wire, stir toggle switch this moment makes the moving contact of SW1 be connected with zero line, host computer reaches the earth terminal GND that promptly is connected to electromagnetic radiation eliminator by the low frequency electromagnetic radiation of the peripheral hardware generation of main frame power supply by the internal interface ground wire, and then eliminated which couple to zero line by electromagnetic radiation, electromagnetic radiation promptly is eliminated.

Electromagnetic radiation eliminator also comprises the electromagnetic radiation test pen that split is provided with, the internal circuit of test pen is referring to Fig. 3, test pen comprises antenna ANT, field effect transistor (MOSFET) T1, triode T2, the LED 1 that is used for radiation test, be used for the LED 2 that power supply shows, the DC power supply BAT of power supply is provided for entire circuit, antenna ANT connects current-limiting resistance R9, R9 is connected with field effect transistor T1 grid, the T1 source electrode is connected with DC power supply BAT is anodal by K switch 1, field effect transistor T1 drain electrode is connected with power supply BAT negative electricity, field effect transistor T1 source electrode is connected by voltage stabilizing didoe D1 with transistor base, triode T2 collector electrode is connected with LED 1 negative pole, the LED 1 anodal resistance R 7 of passing through links to each other with power supply BAT is anodal, the LED 2 anodal resistance R 8 of passing through link to each other with power supply BAT is anodal, LED 2 negative poles link to each other with power supply BAT negative pole, and triode T2 emitter is connected with power supply BAT negative pole.Turn on the power switch K1, energized BAT, LED2 light and illustrate that then power supply BAT is normal, with the radiation test pen near electrical appliance, if electromagnetic radiation is arranged, electromagnetic radiation enters test circuit by antenna ANT, through the amplification of field effect transistor T1 and triode T2 LED 1 is lighted; If LED1 does not work, illustrate that then electromagnetic radiation is eliminated to safe range.

Claims

1. electromagnetic radiation eliminator, comprise housing (1) and main circuit board (4), main circuit board (4) is provided with input (AC1, AC2) and output (AC1 ', AC2 '), and main circuit board (4) comprises the radiation Acquisition Circuit that connected to form by resistance (R5) and electric capacity (C1) back in parallel and earth terminal (GND), by being connected in series with the power sense circuit that LED lamp (NL2) between two inputs and current-limiting resistance (R6) are formed; And by the overvoltage crowbar that is connected in piezo-resistance (S/G) formation between two power inputs; it is characterized in that: also be provided with the zero line testing circuit on the main circuit board: by touching sheet (CP); current-limiting resistance (R3); LED lamp (NL1); current-limiting resistance (R4); resistance after the parallel connection (R5) and electric capacity (C1) are connected successively with the fixed contact of switch (SW1); two moving contacts of switch (SW1) respectively with two input (AC1; AC2) by current-limiting resistance (R1; R2) be electrically connected; touch sheet (CP) with hand; if LED lamp (NL1) is bright, then toggle switch (SW1) makes moving contact be connected with zero line.

2. electromagnetic radiation eliminator as claimed in claim 1 is characterized in that: be connected with thermistor (PR1) between resistance after the parallel connection (R5) and electric capacity (C1) and the earth terminal (GND).

3. electromagnetic radiation eliminator as claimed in claim 1 or 2, it is characterized in that: its housing (1) two ends are provided with power input socket (2) and power supply output plug (3), described housing (1) is provided with universal wheel (5) in output plug (3) one sides, and output plug (3) is rotatably connected by universal wheel (5) and housing (1).

4. electromagnetic radiation eliminator as claimed in claim 1 or 2, it is characterized in that: also comprise the electromagnetic radiation test pen that split is provided with, test pen comprises antenna (ANT), field effect transistor (T1) and triode (T2), be used for the light-emitting diode (LED1) that radiation shows, be used for the light-emitting diode (LED2) that power supply shows, DC power supply (BAT), antenna (ANT) is connected with field effect transistor (T1) grid by current-limiting resistance (R9), field effect transistor (T1) source electrode is connected by switch (K1) and DC power supply (BAT) are anodal, field effect transistor (T1) drain electrode is connected with power supply (BAT) negative electricity, and field effect transistor (T1) source electrode is connected by voltage stabilizing didoe (D1) with triode (T2) base stage; Triode (T2) emitter is connected with power supply BAT negative pole, and triode (T2) collector electrode is connected with light-emitting diode (LED1) negative pole; Light-emitting diode (LED1) is anodal to link to each other by resistance (R7) and power supply (BAT) are anodal; Light-emitting diode (LED2) is anodal to link to each other by resistance (R8) and power supply (BAT) are anodal, and light-emitting diode (LED2) negative pole links to each other with power supply BAT negative pole.